Microwave Mug Brownie

salted butter

packed light-brown sugar

large egg

vanilla extract

cocoa powder

all-purpose flour

baking powder

salt

chocolate chips ((I used half milk chocolate & half semi-sweet))

For Microwave Brownie Sundaes:

Serve with ice cream ((cookies and cream, vanilla bean, chocolate or caramel))

Drizzle with chocolate sauce or caramel sauce and sprinkle with sea salt (, if desired)